package thread;

public class SyncDemo {
    public static void main(String[] args) {
        Table table = new Table();
        Thread t1 = new Thread("甲") {
            public void run() {
                while (true){
                    int bean = table.getBeans();
                    Thread.yield();
                    System.out.println(getName()+":"+bean);
                }
            }
        };
        Thread t2 = new Thread("乙") {
            public void run() {
                while (true){
                    int bean = table.getBeans();
                    Thread.yield();
                    System.out.println(getName()+":"+bean);
                }
            }
        };
        t1.start();
        t2.start();
    }
}
    class Table{
        private int beans = 20;//20个豆子

        public synchronized int getBeans() {
            if (beans == 0) {
                throw new RuntimeException("没豆子了");
            }
            Thread.yield();
            return beans--;
        }
    }

